Question

Please help!

Is △DBE similar to △ABC? If so, which postulate or theorem proves these two triangles are similar?

​1.) △DBE​ is similar to ​△ABC​ by the ​SAS Similarity Theorem​.

​2.) △DBE​ is similar to ​△ABC​ by the ​SSA Similarity Theorem​.

​3.) △DBE​ is similar to ​△ABC​ by the ​SSS Similarity Theorem​.

​4.) △DBE​ is not similar to ​△ABC​.

Answer 1

SAS

Explanation:

we know about left and right side of each triangle, both are increased by 20%, or multiplied by 1.2. so it's like zooming, as long as the factor is the same.

And we know that the upper angle is shared and therefore the same.

makes side-angle-side